<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片区域-->
    <el-card>
      <!--添加角色区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="dialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!--表格区域-->
      <el-table :data="rolesList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!--一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                  <i class="el-icon-caret-right"></i>
                </el-tag>
              </el-col>
              <!--二级和三级权限-->
              <el-col :span="19">
                <!-- 通过for循环 渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="序号" width="80px"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!--添加角色时的对话框-->
      <el-dialog title="添加角色" :visible.sync="dialogVisible" width="50%" @close="dialogClosed">
        <!--主体区域-->
        <span>
          <el-form :model="dialogForm" :rules="dialogFormRules" ref="dialogFormRef" label-width="100px">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="dialogForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="dialogForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
        </span>
        <!--底部区域-->
        <span slot="footer" class="dialog-footer">
          <el-button @click="dialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRoles">确 定</el-button>
        </span>
      </el-dialog>

      <!--编辑角色时的对话框-->
      <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
        <span>
          <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="100px">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="editRoleForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="editRoleForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
        </span>

        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoles">确 定</el-button>
        </span>
      </el-dialog>

      <!--分配权限-->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <el-tree :data="rightsList" :props="treeProps" ref="treeRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data: function() {
    return {
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      dialogVisible: false,
      // 添加角色的表单数据
      dialogForm: {},
      // 添加角色表单验证规则
      dialogFormRules: {
        // 验证角色名称
        roleName: [{ required: true, message: '请输入用角色名称', trigger: 'blur' }],
        // 验证角色描述
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },
      // 控制编辑角色对话框的显示与隐藏
      editDialogVisible: false,
      // 编辑角色时表单数据
      editRoleForm: {},
      // 编辑角色的表单验证
      editRoleFormRules: {
        // 验证角色名称描述
        roleName: [{ required: true, message: '请输入用角色名称', trigger: 'blur' }],
        // 验证角色描述
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },
      // 分配权限框
      setRightDialogVisible: false,
      // 权限列表
      rightsList: [],
      //  树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //   默认选中节点ID值
      defKeys: [],

      // 当前即将分配权限的Id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  mounted() {},
  methods: {
    // 获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
      // this.getRolesList()
    },
    // 监听添加角色对话框的关闭事件
    dialogClosed() {
      this.$refs.dialogFormRef.resetFields()
    },
    // 点击确定，添加新角色
    addRoles() {
      // 添加角色的预验证
      this.$refs.dialogFormRef.validate(async valid => {
        // 预校验失败
        if (!valid) return
        // 预校验成功
        const { data: res } = await this.$http.post('roles', this.dialogForm)
        // console.log(res)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        // 关闭添加角色对话框
        this.dialogVisible = false
        // 重新刷新角色列表
        this.getRolesList()
      })
    },
    // 监听编辑角色时对话框的关闭重置表单事件
    editDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },
    // 编辑角色
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      // console.log(id)
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败!')
      }
      this.editRoleForm = res.data
      this.editDialogVisible = true
    },
    // 点击确定,保存编辑后的角色
    editRoles() {
      this.$refs.editRoleFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editRoleForm.roleId, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc
        })
        if (res.meta.status !== 200) {
          this.$message.error('更新角色信息失败!')
        }
        this.editDialogVisible = false
        this.$message.success('更新角色信息成功!')
        this.getRolesList()
      })
    },

    // 删除角色
    async removeRoleById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除用户成功！')
      this.getRolesList()
    },

    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示 删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 点击确定 返回值为：confirm
      // 点击取消 返回值为： cancel
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消权限删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.rolesList = res.data
      //   不建议使用
      // this.getRolesList()
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取角色的所有权限
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      //   获取权限树
      this.rightsList = res.data
      //   console.log(res)
      //   递归获取三级节点的id
      this.getLeafkeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
    getLeafkeys(node, arr) {
      // 没有children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      // 不是三级节点，递归获取
      node.children.forEach(item => this.getLeafkeys(item, arr))
    },
    // 权限对话框关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 分配权限
    async allotRights(roleId) {
      // 获得当前选中和半选中的Id
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      // join() 方法用于把数组中的所有元素放入一个字符串
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-card {
  margin-top: 15px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15) !important;
}
.el-table {
  margin-top: 15px;
}
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
